[ubuntu] Simple Scan - No scanners detected ...

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I've had my MFC-440CN printer scanner working with several
prior Ubuntu releases - but 12.04 just will not recognize the
driver. The driver installs without error. There also are
numerous posts that other folks are seeing this same problem.
When I start Simple Scan, I get "No scanners detected".
Is there a fix for this???
Thanks
Carl
(Hardware)

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Is there any issue running Simple Scan or gscan2pdf in ROOT? When I try to run these programs in normal they don't recognize my scanner (printer works fine)? They work fine in ROOT. Xsane doesn't work in either case. While reading numerous posts in numerous forums I understand there can be issues with Linux Mint 17 recognizing scanners.

I have two Ubuntu computers on the same network.
The old one uses Ubuntu 14.04. Simple scan works perfectly with my Samsung SCX-3205w.
The new one uses Ubuntu 15.04. On it, simple scan cannot find the same scanner : "No scanners available. Please connect a scanner".
I've tried to launch simple scanner as root without success.
The printing function works.